The ‘‘A’’ position identifies the total number of carbon atoms in the fatty acid.
Position ‘‘B’’ is the number of double bonds from the aliphatic (v) end of the molecule.
‘‘C’’ designates the carbon atom from the aliphatic end before the double bond.
This is followed by a ‘‘c’’ for cis or a ‘‘t’’ for trans configuration of monoenoics.
The prefixes ‘‘i’’ and ‘‘a’’ stand for iso or anteiso, respectively.
Midchain branching is noted by ‘‘me,’’ and cyclopropyl fatty acids are designated as ‘‘cy.’’